<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 15:20:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.27 (027) 15:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602701271520009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.161" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.880" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.365" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.349" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="461.043" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="263.324" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.355" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="257.914" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="63.412" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="142.589" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="300.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="64">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 400.000 405.000 409.286 413.571 417.857 422.143 426.429 430.714 435.000 435.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 505.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 550.000 555.000 565.000 575.000 580.000 590.000 600.000 610.000 620.000 630.000 640.000 655.000 660.000 670.000 680.000 685.000 695.000 704.436 714.833 726.345 739.164 753.524 769.722 788.133 809.245 833.700 862.359 896.410 937.530
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 45 0 54 0 45 0 0 48 54 51 51 0 0 51 0 45 54 51 54 60 54 0 54 57 60 60 51 51 60 60 60 60 63 63 63 60 63 60 57 54 57 60 63 63 60 60 57 57 54 51 48 51 51 45 45 48 51 51 0 45 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.488 90.0 95.0 100.0 105.0 110.0 111.653 113.305 114.958 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 461.043 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.264 2.912 3.255 3.365 3.242 3.242 3.365 3.366 3.482 3.588 3.689 3.788 3.885 3.982 4.079 4.177 4.276 4.376 4.477 4.581 4.686 4.792 4.9 5.009 5.119 5.23 5.342 5.454 5.567 5.678 5.79 5.901 6.01 6.119 6.226 6.332 6.437 6.54 6.641 6.741 6.839 6.936 7.032 7.125 7.218 7.308 7.398 7.486 7.572 7.658 7.742 7.824 7.906 7.986 8.064 8.142 8.218 8.292 8.365 8.437 8.507 8.575 8.641 8.705 8.767 8.826 8.882 8.936 8.985 9.031 9.072 9.109 9.139 9.164 9.183 9.195 9.2 9.2 9.199 9.197 9.192 9.185 9.176 9.165 9.152 9.137 9.12 9.102 9.082 9.06 9.036 9.011 8.985 8.957 8.928 8.897 8.865 8.831 8.797 8.761 8.724 8.686 8.646 8.606 8.565 8.523 8.48 8.436 8.391 8.346 8.299 8.252 8.205 8.156 8.108 8.058 8.008 7.958 7.907 7.855 7.803 7.751 7.699 7.646 7.592 7.539 7.485 7.431 7.377 7.323 7.268 7.213 7.159 7.104 7.049 6.994 6.939 6.884 6.829 6.773 6.718 6.663 6.608 6.554 6.499 6.444 6.39 6.335 6.281 6.227 6.173 6.119 6.065 6.012 5.958 5.905 5.853 5.8 5.748 5.695 5.644 5.592 5.541 5.489 5.439 5.388 5.338 5.288 5.238 5.189 5.14 5.091 5.042 4.994 4.946 4.899 4.851 4.805 4.758 4.712 4.666 4.62 4.575 4.53 4.485 4.441

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.365" PeakHeight="110.0" Num="3" Error="0.0">
-30.482 13.125 -3.155
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.365" EndFrequency="9.2" PeakHeight="461.043" Num="5" zHalfNm="263.324" Error="7.33">
-324.897 -35.216 19.962 -9.745 3.811
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.958" Depth="0.123"/>
<TopsideChapman PeakHeight="461.043" PeakDensity="1050124.1" PeakScaleHeight="142.589" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
